|Institution|Location|Enrollment|Nickname|Varsity Sports|Rugby Since|Head Coach|
|---|---|---|---|---|---|---|
|Clemson University|Clemson, South Carolina|20,576|Tigers|19|1967|Justin Hickey|
|Maryland|College Park, Maryland|37,641|Terrapins|20|1968|Jeff Soeken|
|Navy|Annapolis, Maryland|4,576|Midshipmen|30|1963|Mike Flanagan|
|North Carolina|Chapel Hill, North Carolina|29,340|Tar Heels|28|1966|Pete Earsman|
|North Carolina State|Raleigh, North Carolina|34,767|Wolfpack|25|1965|Jim Latham|
|University of Virginia|Charlottesville, Virginia|20,895|Cavaliers|25|1961|Jon Roberts|
|Virginia Tech|Blacksburg, Virginia|30,379|Hokies|21|1891 / 1968|Andy Richards|
|Wake Forest|Winston-Salem, North Carolina|7,079|Demon Deacons|18|1973|Patrick Kane|

Question: how many schools in the acrl have at least 20 varsity sports?
Answer: 6